(19)

(11)

EP 0 687 328 A1

(12)

(43) Date of publication: 20.12.1995 Bulletin 1995/51 (21) Application number: 94907464.0 (22) Date of filing: 23.02.1994

(51) International Patent Classification (IPC):  E01F 5/ 00( . ) (86) International application number: PCT/CA1994/000093 (87) International publication number: WO 1994/020685 (15.09.1994 Gazette 1994/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 04.03.1993 CA 19932090983 (71) Applicant: WILSON, Michael W. Middlesackville, New Brunswick E0A 2E0 (CA)	(72) Inventors: WILSON, Michael, W. Middlesackville, New Brunswick E0A 2E0 (CA) McCAVOUR, Thomas, C. Etobicoke, Ontario M9B 2H5 (CA) (74) Representative: KUHNEN, WACKER & PARTNER  Alois-Steinecker-Strasse 22 D-85354 Freising D-85354 Freising (DE)